CpuinfoIOGroup: throw when signals cannot be properly read
CpuinfoIOGroup: throw when signals cannot be properly read

Signed-off-by: Brad Geltz <e42f3ad4099980ea02f08e076efbee5cf9d4a803@intel.com>
Change-Id: I6a72fe06dc3908d05b00e3c4bcd01ccadbe609da

cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,geopm/geopm,geopm/geopm,cmcantalupo/geopm,geopm/geopm,cmcantalupo/geopm,geopm/geopm,cmcantalupo/geopm